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Childhood and father's influence; high school in Washington, DC. Enters Washington & Lee University, 1923; becomes assistant at Yerkes Observatory, 1926, while continuing courses; B.S., 1927. Marriage to Helen Barrett. Contacts with Otto Struve, Mario Schoenberg, Dmitri Mihalis. Invention of UBV system; work on A-type stars, MK system, Ph.D. Work during 1930s on effects of metals in spectra; revision of HR Diagram, work on "spottedness" of stellar surface; changes of interest, paper on two-dimensional arrays, 1937. Problems of promotion and tenure at University of Chicago.